Inibição da expressão de ciclooxigenase 2 em feridas cutâneas de camundongos NOD submetidos à terapia a laser de baixa intensidade Inhibition of cyclooxygenase 2 expression in NOD mice cutaneous wound by low-level laser therapy

CONTEXTO: A terapia a laser de baixa intensidade (LLLT) tem sido relatada como importante moduladora da cicatrização de feridas cutâneas aumentando a proliferação fibroblástica associada ao aumento da expressão da citocina fator transformador de crescimento- &#946;2 (TGF-&#946;B2). OBJETIVO: No presente estudo foram avaliados os efeitos da LLLT sobre a expressão da enzima ciclooxigenase 2 (COX2) no sítio do reparo tecidual utilizando o modelo experimental com camundongos diabéticos não obesos (NOD) para estudar a cicatrização de feridas cutâneas. MÉTODOS: Foram utilizados 30 camundongos NOD, destes 14 ficaram diabéticos e foram divididos em dois grupos: o grupo I (n=7) foi submetido a um procedimento cirúrgico de feridas cutâneas e o grupo II (n=7) foi submetido a um procedimento cirúrgico de feridas cutâneas e tratados com LLLT. O grupo II foi submetido à LLLT nos seguintes parâmetros: 15 mW de potência, dose de 3,8 J/cm² e tempo de aplicação de 20 segundos. Após sete dias do ato cirúrgico e após aplicação do laser, os animais foram eutanasiados com sobredose de anestesia e amostras das feridas foram colhidas para posterior análise histopatológica, histomorfométrica e imuno-histoquímica. RESULTADOS: A LLLT promoveu a inibição da expressão da COX2 em feridas cutâneas de camundongos diabéticos. CONCLUSÃO: Em conjunto, os resultados sugeriram que a LLLT é capaz de modular negativamente a expressão da enzima COX2 contribuindo para o controle da resposta inflamatória em feridas cutâneas de camundongos NOD.<br>BACKGROUND: Low-level laser therapy (LLLT) has been reported to modulate the healing of wounds by inducing an increase in fibroblast number associated with increased expression of the cytokine transforming growth factor-&#946;2 (TGF-&#946;2). OBJECTIVE: In the present study, the effect of LLLT on expression of COX2 at the site of tissue repair was evaluated, using an experimental model with non obese diabetic mice (NOD) to study cutaneous wound healing. METHODS: Thirty NOD mice were used, of which 14 were diabetic and were divided into two groups: group I (n=7) underwent a surgical procedure of skin wounds and group II (n=7) underwent a surgical procedure of skin wounds and treated with LLLT. Group II was submitted to LLLT in the following parameters: 15 mW of power, dose of 3.8 J/cm² and exposure time of 20 seconds. Seven days after surgery and after laser application, animals were euthanized with an overdose of anesthesia and tissue samples were collected for subsequent histological analysis, histomorphometry and immunohistochemistry. RESULTS: The LLLT has promoted the inhibition of COX2 expression in skin wounds in mice diabetic. Taken together the results suggest that LLLT modulate the expression of COX2 improved the control of inflammatory reaction in cutaneous wound lesions in NOD mice. CONCLUSION: Taken together, the results suggested that LLLT is able to negatively modulate the expression of COX2 enzyme contributing to the inflammatory response in cutaneous wounds in NOD mice

Erice 2018 Charter on the role of the National Health Service in the prevention of doping

The Erice 2018 Charter was unanimously approved at the conclusion of the 53rd Residential Course of the International School of Epidemiology and Preventive Medicine "Adapted Physical Activity in Sport, Wellness and Fitness; the role of the Departments of Prevention and of the National Health Service in doping prevention and health promotion", held on 15-19 May 2018 in Erice, Italy, at the "Ettore Majorana" Foundation and Centre for Scientific Culture, and promoted by the Study Group on "Movement Sciences for Health" of the Italian Society of Hygiene, Preventive Medicine and Public Health. The event was part of a larger project supported by the Ministry of Health aimed at preventing doping in the general population involved in sport and physical activities. After an intense discussion the participants focused on ten statements involving the following critical issues: responsibility, priority, message, alphabetization, networks and alliances, school promoting health, player and opportunities, competences, know-how, programming and acting. These statements provide hints to approach doping within a public health frame and summarize the role of the Departments of Prevention and NHS in promoting and coordinating preventive actions with other institutions and stakeholders. Doping represents a complex phenomenon related to cultural, social, economic and legal issues. In addition to regulatory or repressive actions, education to health and legality is proposed as the fundamental strategy to contrast doping by promoting healthy lifestyles, based on scientific knowledge and respect for legality